Incorrect statement for Tyndall effect is:

Option 1 - The refractive indices of the dispersed phase and the dispersion medium differ greatly in magnitude.

Option 2 - The diameter of the dispersed particles is much smaller than the wavelength of the light used.

Option 3 - During projection of movies in the cinemas hall, Tyndall effect is noticed.

Option 4 - It is used to distinguish a true solution from a colloidal solution

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Payal Gupta | Contributor-Level 10

6 months ago

Correct Option - 2

Detailed Solution:

$A l^{+ 3}$ → number of electrons = 10

Br → number of electrons = 36

$B e^{+ 2}$ → number of electrons = 2

$C l^{-}$ → number of electrons = 18

$L i^{+}$ → number of electrons = 2

$S^{- 2}$ → number of electrons = 18

K⁺ → number of electrons = 18

O^-2 → number of electrons = 10

Mg⁺² → number of electrons = 10

O^-2 & Mg⁺² are isoelectronic with Al⁺³

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